Meet Sawaki Tadayasu, second son of yeast preparation suppliers, who is forced to go to an agricultural university and continue the family business. He has the unique ability to see microbes, and so he and his friend, Kei, are taken as students to the fermentation-process obsessed Itsuki-sensei. This manga follows Sawaki as he tries to make his way through university as discreetly as possible…which is pretty impossible if you’re as talented as he is.